Filter element, pre-filter and water heater

The utility model discloses a filter element, a pre-filter and a water heater. The filter element comprises a shell, the shell comprises a barrel, a mounting component and a plug, an inlet and an outlet are formed in the barrel, a mounting opening is formed in the end, provided with the inlet, of the barrel, the end, provided with the outlet, of the barrel is arranged on the mounting component, and the plug is detachably arranged on the mounting opening; the core body is arranged in the barrel body and is configured to filter water input from the inlet and output the water from the outlet; and the filter screen sleeve is sleeved outside the cylinder body and covers the inlet. The maintenance cost of the filter element is reduced, so that the user experience is improved. 本实用新型公开了一种滤芯、前置过滤器及热水器。滤芯包括：壳体，所述壳体包括筒体、安装部件和堵头，所述筒体上形成有进口和出口，所述筒体设置有所述进口的端部形成安装口，所述筒体设置有所述出口的端部设置在所述安装部件上，所述堵头可拆卸地设置在所述安装口上；芯体，所述芯体设置在所述筒体中并被配置成对所述进口输入的水进行过滤处理并从所述出口输出；过滤网套，所述过滤网套套在所述筒体的外部并遮盖住所述进口。实现降低滤芯维护成本以提高用户使用体验性。